Have you ever been sold to by an overly aggressive salesperson? Do you remember how you felt in the moment?
Now think of the entertaining guy selling his products on the city streets, or the tabletop vendor at a fair giving a hilarious demonstration.
If you could use their product, chances are you'd by it from the friendly sociable seller.
That seller connected with you. You two had a connection, even for just a moment.
When you connect with your customer on a personal level, you create a feeling of trust.
Remember, selling your product or service is about solving a problem for your customer.